What is this, 10?

I heard a brother speak last night,
And he said Strife!
Find a noble nurse for me,
And send her over to Calgary.'

I faltered, taking up the word:
'Not so, my bro!
If wifes must be, choose another
don’t send a nurse to wed my brother.

But she is bound by greatitude,
By love of cats,
To brother of mine in Calgary
Who stretch out kindly hands to she.

'Therefore,' the sis said, 'shalt thou wed
a nurse to-night.
From the summits of love a nurse is driven,
As lightning is from the tops of heaven.'